125402281235857 has 4 divisors (see below), whose sum is σ = 125403371265316. Its totient is φ = 125401191206400.

The previous prime is 125402281235839. The next prime is 125402281235867. The reversal of 125402281235857 is 758532182204521.

It is a Cunningham number, because it is equal to 11198316²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9594357570576 + 115807923665281 = 3097476^2 + 10761409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125402281235857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125402281235798 and 125402281235807.

It is not an unprimeable number, because it can be changed into a prime (125402281235837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544842144 + ... + 545072257.

It is an arithmetic number, because the mean of its divisors is an integer number (31350842816329).

Almost surely, 2^{125402281235857} is an apocalyptic number.

It is an amenable number.

125402281235857 is a deficient number, since it is larger than the sum of its proper divisors (1090029459).

125402281235857 is a wasteful number, since it uses less digits than its factorization.

125402281235857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090029458.

The product of its (nonzero) digits is 10752000, while the sum is 55.

The spelling of 125402281235857 in words is "one hundred twenty-five trillion, four hundred two billion, two hundred eighty-one million, two hundred thirty-five thousand, eight hundred fifty-seven".